of school tragedy continues tomorrow morning at 4:00 a.m. with a special edition of "good morning america." we'll have bay area reaction followed by another hour of "good morning america" at 7:00 and then the morning news at 8:00. >> we'll stay on top of this. >> it's going to be a chilly start especially inland. low 30s to mid 40s. partly cloudy by 8:00 a.m. mid 30s to 40s, rain coming in by the afternoon. >> dan: thanks very much. that is our report. "nightline" is next. >>> tonight on a special edition of "nightline," classroom tragedy. at least 20 young children and six adults shot and killed inside a connecticut elementary school. the worst shooting of its kind in history. we're eeg on the ground with parents, students and teachers, as a town and a nation grieves. >> the majority of those who died today were children, beautiful little kids between the ages of 5 and 10 years old.